One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10)(11,12)(13,16)(14,15)(18,21)(22,24)(25,26,28,30)(27,31,32,29)(1,3,5,8)(2,6,7,4)(9,11)(10,13)(12,15)(14,16)(19,23)(22,24)(25,26,28,30)(27,29,32,31)(1,3)(2,4)(5,8)(6,7)(9,12,14,13)(10,11,15,16)(17,18)(19,22)(20,21)(23,24)(25,27)(26,29)(28,32)(30,31)(1,3)(2,4)(5,8)(6,7)(9,13,14,12)(10,11,15,16)(17,19)(18,22)(20,23)(21,24)(25,26)(27,29)(28,30)(31,32)(1,4)(2,3)(5,6)(7,8)(9,11)(10,12)(13,15)(14,16)(17,18)(19,22)(20,21)(23,24)(25,27)(26,29)(28,32)(30,31) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.